We Robu.in have Seedstudio and Ai Thinker LoRa (Long Range) Wifi module with its varying frequency. LoRa is a ‘Long Range’ low power wireless standard intended for providing a cellular style low data rate communications network. LoRa modulation technology has obvious advantages in anti-blocking and selection, which solves the problem that the traditional design scheme cannot consider the distance, interference, and power consumption at the same time.